It may have something to do with my P2's contact with water (albeit small) when I applied a Protech screen protector, but only until recently have I heard one single, loud crackle sound whenever music is triggered - e.g, when the starting and closing sounds of the P2 begin, and whenever a song plays, stops, or switches to another song.

It's not my headphones, as I connected my P2 to my speakers and the single crackling sound is extremely, extremely noticable.

I have a white 4gb P2, Korea region, firmware 5.10. I've reseted it many times. What should I do?